Examination of the reactions of protein disulfide sulfur led to the implication of three mechanisms in the removal of sulfur from cystinyl residues. (a) Persulfide formation in alkali with subsequent loss of the reactive persulfide sulfur; (b) organic thiocyanate formation by direct attack of CN-, followed by elimination of SCNby OHor by appropriately located intraprotein nucleophiles; and (c) ...

The purpose of this study was a detailed characterization of Shewanella sp. O23S, a strain involved in arsenic transformation in ancient gold mine waters contaminated with arsenic and other heavy metals. Physiological analysis of Shewanella sp. O23S showed that it is a facultative anaerobe, capable of growth using arsenate, thiosulfate, nitrate, iron or manganite as a terminal electron acceptor...

INTRODUCTION Calciphylaxis is a rare but dreadful complication of chronic kidney disease. It is characterized by nodular subcutaneous calcification and painful tissue necrosis which often results in ulceration and secondary infection, leading to a high rate of mortality. Pathogenesis of this disease is not well understood and there are very few, poorly studied treatment options for this disease...

Tiosulfat sebagai larutan pelindian emas pertama kali dipelajari pada tahun 1979 untuk menemukan alternatif sianida dan merkuri yang banyak digunakan dalam industri ekstraksi meskipun berdampak negatif bagi lingkungan. Sampel bijih adalah asli dari Bolaang Mongondow, Sulawesi Utara. Berdasarkan pengamatan Mikroskop Optik karakterisasi LIBS, terdapat senyawa pirit merupakan salah satu karakteris...

After gold recovery using silicon powder from an ammonium thiosulfate leaching solution containing copper（II）sulfate（oxidizing agent for dissolution）, copper was also recovered. a certain period of time, redissolution occurred. Then redissolved. The depletion in the during process leads to redissolution.

Colonic bacteria liberate large quantities of the highly toxic gases hydrogen sulfide (H(2)S) and methanethiol (CH(3)SH). The colonic mucosa presumably has an efficient means of detoxifying these compounds, which is thought to occur through methylation of H(2)S to CH(3)SH and CH(3)SH to dimethylsulfide (CH(3)SCH(3)). We investigated this detoxification pathway by incubating rat cecal mucosal ho...

Sulfate transport capacity was not regulated by cysteine, methionine, or glutathione in Pseudomonas halodurans, but growth on sulfate or thiosulfate suppressed transport. Subsequent sulfur starvation of cultures grown on all sulfur sources except glutathione stimulated uptake. Only methionine failed to regulate sulfate transport in Alteromonas luteo-violaceus, and sulfur starvation of all cultu...

The design, characterization, and performance of a bioreactor-settler system that allows the partial biological oxidation of reduced sulfur compounds is described. The design incorporates the physical separation of the aeration from the bioreactor. The reactor has a dynamic flow zone and a static zone. Steady state thiosulfate-oxidizing cultures were established at different O2/S2O32− molar rat...